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2. Amfibia - Wikipedia

   en.wikipedia.org/wiki/Amfibia

   The watch includes a rotating bezel which is used to mark the time you first submersed. The dial and hands are luminescent so that the watch can be read in the darkness of ocean depths. However, this luminescence is significantly weaker and of shorter duration than on comparable Japanese and Swiss watches.

3. Diving watch - Wikipedia

   en.wikipedia.org/wiki/Diving_watch

   A diving watch, also commonly referred to as a diver's or dive watch, is a watch designed for underwater diving that features, as a minimum, a water resistance greater than 1.1 MPa (11 atm), the equivalent of 100 m (330 ft). The typical diver's watch will have a water resistance of around 200 to 300 m (660 to 980 ft), though modern technology ...

4. Diving equipment - Wikipedia

   en.wikipedia.org/wiki/Diving_equipment

   Rebreather diving, closed-circuit or semi-closed-circuit scuba; Freediving or breathhold diving, where the diver completes the dive on a single breath of air taken at the surface before the dive. Snorkelling allows breathing at the surface with the face submerged, and is used as an adjunct to free diving and scuba.

5. John Harwood (watchmaker) - Wikipedia

   en.wikipedia.org/wiki/John_Harwood_(watchmaker)

   Harwood self-winding watch. In 1923, supported by a local businessman, he developed a self-winding wristwatch and applied for a patent in Switzerland, which was granted in September, 1924. His design ensured that the watch could be hermetically sealed against the ingress of water or dust. The hands could be reset by a rotating bezel.

6. Cressi-Sub - Wikipedia

   en.wikipedia.org/wiki/Cressi-Sub

   Product innovation for scuba divers have also been significant, including the first open-heel adjustable dive fin and the first diving mask with a dedicated nose pocket. Today Cressi is one of only a few companies in the world that manufactures a full line of equipment and accessories for each of its markets.

7. Geneva drive - Wikipedia

   en.wikipedia.org/wiki/Geneva_drive

   In watches, the "drive" wheel is the one that winds up the spring, and the Geneva wheel with four or five spokes and one closed slot prevents overwinding (and also complete unwinding) of the spring. This so-called Geneva stop or "Geneva stop work" was the invention of 17th or 18th century watchmakers.

8. Tourbillon - Wikipedia

   en.wikipedia.org/wiki/Tourbillon

   Tourbillon movement (high resolution)In horology, a tourbillion (/ t ʊər ˈ b ɪ l j ən /) or tourbillon (/ t ʊər b ɪ ˈ j ɒ n /; French: [tuʁbijɔ̃] "whirlwind") is an addition to the mechanics of a watch escapement to increase accuracy.

9. Dacor (scuba diving) - Wikipedia

   en.wikipedia.org/wiki/Dacor_(scuba_diving)

   DACOR Corporation was a former American manufacturer of scuba diving equipment which was founded in 1954 by Sam Davison Jr. in Evanston, Illinois as "The Davison Corporation". Since its foundation. DACOR was one of the five early American diving equipment manufacturers. Together, they were: DACOR; U.S. Divers (Now Aqua-Lung)